I used to be a CRA auditor, so I can help you navigate the CRA language. If you have a letter from audit, and you aren't sure what they are asking for .... ask me! I can probably translate for you! Depending on what the issue is, there may be a charge (based on my consulting prices) or if it is really simple, it's more likely that I will just tell you what the auditor is actually looking for with no charge at all.
When I was an auditor, I tried to explain what I needed in simple language; but sometimes, auditors use accounting terms that can be confusing. I'm more than happy to translate if it means a smoother, quicker audit for you!